Fishing tip-up



FIG. 1 is a perspective view showing my new design for a fishing tip-up, the portion shown in dotted lines is for illustrative purposes only and forming no part of the claimed design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a bottom view thereof;

FIG. 4 is a front view thereof;

FIG. 5 is a rear view thereof;

FIG. 6 is a left side view thereof; and,

FIG. 7 is a right side view thereof. 

The ornamental design for a fishing tip-up, as shown and described. 